I was kicking myself last week wondering why am I not seeing a last logged out time in SharePoint. I talked to a few people and I guess I never really though about it. If you are using Active Directory, then there really is no last logged out time for SharePoint. There is a last logged out time in Active Directory, because AD is what is handling SharePoint. So when you logout and you close the browser, then open it back up with SharePoint it will show up with yourself fully logged in. I came up with...